7639508993991 has 32 divisors (see below), whose sum is σ = 11954525227008. Its totient is φ = 4248946782720.

The previous prime is 7639508993981. The next prime is 7639508994037. The reversal of 7639508993991 is 1993998059367.

It is not a de Polignac number, because 7639508993991 - 2⁵ = 7639508993959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7639508993981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21202930 + ... + 21560223.

It is an arithmetic number, because the mean of its divisors is an integer number (373578913344).

Almost surely, 2^{7639508993991} is an apocalyptic number.

7639508993991 is a deficient number, since it is larger than the sum of its proper divisors (4315016233017).

7639508993991 is a wasteful number, since it uses less digits than its factorization.

7639508993991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42763391.

The product of its (nonzero) digits is 892820880, while the sum is 78.

The spelling of 7639508993991 in words is "seven trillion, six hundred thirty-nine billion, five hundred eight million, nine hundred ninety-three thousand, nine hundred ninety-one".